Supported Devices:

PowerBook:
PowerBook G3 (Lombard) Mid 1999
PowerBook G3 (Pismo) Early 2000
PowerBook G4 (Titanium) Early 2001 or later
PowerBook G4 (Aluminium) Early 2003 or later

iBook:
iBook G3 (Clamshell) Mid 1999 or later
iBook G3 (Snow) Mid 2001 or later
iBook G4 Late 2003 or later

PowerMac:
PowerMac G3 (Blue & White) Early 1999 or later
PowerMac G4 (Translucent) Mid 1999 or later
PowerMac G4 (Cube) Mid 2000
PowerMac G4 (Quicksilver) Mid 2001 or later
PowerMac G4 (Mirror Drive Door) Mid 2002 or later
PowerMac G5 Mid 2003 or later

eMac:
eMac Mid 2002 or later

iMac:
iMac G3 Mid 1998 or later
iMac G4 Early 2002 or later
iMac G5 Mid 2004 or later

Mac Mini:
Mac Mini G4 Early 2005 or later

Initial Release: 10.3.0 (October 24 2003)
Latest Release: 10.3.9 (April 15 2005)

New Features:
- New Finder Look
- iChat AV
- Safari
- Improved data erasing security